[JK07]

Hi guys

Have a 2007 320i and is blwoing smoke under accelartion. Not sure why.
Changed coil ignition packs, new oil serviced every 10 K with engine flush. New spark plugs etc.
Pulled the spark plugs out to check for oil but they are dry. Also cleaned the vanos and replaced seals.

Pcv valve was changed few years ago but i service my car on a very regular basis so it cant be blocked.

Also the coolant level is constant.

There are so many things which can go wrong but any help would be great.

Is the valve hard to replace diy?